dodo512

location / {
    try_files $uri $uri/ =404;
}

Заменить на

location / {
    try_files $uri $uri/ =404;
}

location /home/downloadsites/ {
    root /;
}

/.htaccess

RewriteEngine On
RewriteRule .* frontend/$0 [L]

/frontend/.htaccess

RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule . index.html [L]

/api/.htaccess

RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule . index.php [L]

location / {
    if (!-e $request_filename){
                    rewrite ^/(.*) /index.php?code=$query_string;
            }

    location ~ [^/]\.ph(p\d*|tml)$ {
        try_files /does_not_exists @php;
    }
}

Если там запрос в папку /dir/, то этот фрагмент нужно поменять на такой:

location / {

}

location ~ ^/dir/([0-9A-Za-z]*)$ {
    try_files $uri /dir/index.php?code=$1&$args;
}

И ещё поменять location @php { на location \.php$ {

/href="https?:\/\/(?!(?:www\.)?example\.ru)([^"]+)/i

{"name":"[^"]*"}

RewriteEngine On
RewriteCond %{REQUEST_URI} !^/test/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule . /index.php [L]

Или

RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule . /index.php [L]

Файл /doma/.htaccess

AddDefaultCharset UTF-8

RewriteEngine On

RewriteCond %{HTTP_REFERER} ok\.ru [NC,OR]
RewriteCond %{HTTP_REFERER} mamba\.ru [NC,OR]
RewriteCond %{HTTP_REFERER} facebook\.com [NC]
RewriteRule ^ - [F]

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /doma/
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /doma/index.php [L]
</IfModule>
# END WordPress

Redirect 301 /category/ /new-category/
Или

RewriteEngine on

RewriteRule ^category/(.*) /new-category/$1 [R=301,L]